Machine foe straightening shafts



(No Model.) 4 Sheets-Sheet 1 H. W. HILL. MACHINE PoR STRAIGHTENING SHAPTS, TUBES, (Kw.

No. 606,214. Patented June 28,1898.

IIIHIII I IHIIIIHIIIIIIHIIR HIIIIIIHIIIIIIIHIIII 71Q71 65569, l Ewenfoh @mmmw Jimff@ (No Model.) 4 Sheets-Sheet 2A H; W. HILL. MACHINE PDR STRAIGHTBNING SHAPTS, TUBES, 650. I No. 606,214. Patente-d June 28, 1898.

WI T NESSES. 6/ INVENTOR.

(No Model.)

yH'. W. HILL.

4 Sheets-Sheet 3.

MACHINE FOR STRAIGHTBNING SHAFTS, TUBES, &c.

Patented June 28, 1898.

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IN YENTOR maw, gig www (No Model.) 4 Sheets-Sheet 4.

H. W. HILL. MAGHINE FOR STRAIGHTENING SHAPTS. TUBES, &c. No. 606,214. Patented June 28, 1898.

llllllill l-l INI 'V7/Tfn @56601 (5? d?. aw/am Improvements in Machines for Straightening and other like cylindrical bodies which shall HARRY w. InLL, or

'ATENT rricn.

CLEVELAND, OHIO.

MACHINE FOR sTRAlcl-ITENING sHA'FTs,TUBEs,&C.

SPECIFICATION forming part of Letters Patent No, 606,214, aerea-June es, i898.

Application filed April 3, 1897. ASerial No. 630,528. Y(ll'o model.)

To a/ZZ whom t may concern:

Be it known that I, HARRY W. HILL, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and St-ate of Ohio, have invented certain new and useful Shafts, Tubes, dac.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as -will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide a machine for straightening shafts,tubes, pipes,

be simple in construction and efficient in operation.

Several styles -of straightening-machines have been heretofore used. My machine is of the type wherein the straightening and draft rolls maintain a fixed relatiOn to the main frame of the machine during the straightening operation. Some of these rolls are positively driven, with the result that they drag the shaft endwise between them and rotate and straighten it as it so moves. My invention consists of the combinations of parts by which this is efficiently accomplished, as is more fully hereinafter pointed out and as is definitely specifiedin the claims.

The drawings show the best embodiment of my invention at present known to me.

Figure l ,is an elevation `of my improved machine, and Fig. 2 is a plan of the central portion thereof. Fig. 3 is a vertical section on the line 3 3 of Fig. 1, looking to the right of said figure, and'thus being substantially an end view. Fig. 4f is a perspective view of one of the shaft-supporting carriages shown on a smaller scale in Fig. l, and Fig. 5 is a plan of the same. Fig. 6 is an end View of said carriage, the parts shown askew in the two preceding iig-ures being rectangled for convenience of illustration. Fig. 7 is a horizontal section on the line 7 7 of Fig. l, being a bottom plan of the cross-head and straightening and draft rollers carried thereby.

Similar letters of reference designate similar parts in each iigure.

Referring to the parts by letters, A represents the base of the machine, which is preferably a box-like structure, which should be securely bolted to the licor. The main driving-shaft F is" mounted in a bracket a7, formed on the rear side of the base.

' B represents a counter-shaft which extends longitudinally through the base, being journaled in boxesa a. in the ends thereof,wlhich boxes may be vertically adjustable to take up the stretch of the driving-chains. A shaft B', of smaller diameter than the counter-shaft proper, extends from each end of the. latter a very considerable distance beyond the ends of the base, sufficiently far to enable it to perform the functions hereinafter described. Slow motion is transmitted from shaft F to I shafts B and B'by means of the pinion fand gear b, which are secured, respectively, to said shafts.

Three pairs of draft-rolls G G are mounted in housings E,which are bolted in oblique positions upon the base in the manner substantially as shown, whereby the shaft X to be straightened (indicated by dotted lines in Fig. l) will be supported by all of the said rolls and the axes of said rolls will be oblique to the axis of the said shaft X. To the shaft G of each of said draft-rolls a sprocket-wheel g2 is secured. vThese housings and draftrolls are of peculiar construction,which is of advantage, principally because it reduces their cost, particularly the cost of patternmaking. Y

Each housing consists of two sides or sections e e, whichfare exactly alike, and each consists of a horizontal base having on its inner edge a Iraised flange c4. These flanges are connected at their ends by bolts e2. They are likewise offset near the bearing of one rollshaft, wherefore the boss e3, in which is formed one bearing for one of theroll-shafts, is nearer the line of division betweenthe housing-sections than the other bearing-boss e5.

The shafts g g are mounted in bearings in the bosses@3 e5. The rolls G' and sprocket-` wheels gzare placed on the shafts with the hub of the roll adjacent to the inwardly-extended boss e3,while the hub of the sprocketwheel is adjacent to the boss e5. The lrolls are thereby held in' alinement with each ,other,while the sprocket-wheels are at opposite ends of the rolls, wherefore they cannot interfere with each other.

On each housing-section there is a sectorshaped upward extension c6 of the flange'c",

IOO

partly in both plates.

p serve as bearings for the shafts d.

which is concentric with the adjacent roll, but of a slightly-smaller diameter, and this sector-shaped extension is adjacent to that part of the roll which is above its center and toward the other roll. When the housingsections are turned end for end, as shown, these two sector-shaped extensions lie on opposite sides of the plane passing between said rolls. If either roll-shaft should break, the shaft X would temporarily be supported on one or both of these sector-shaped extensions.

Sprocket-chains g3 transmit motion from sprocket-wheels b2, which are keyed to the counter-shaft B, to said sprocket-wheels g2, whereby the draft-rolls G are driven positively. These chains will stretch in use, and therefore the boxes c, in which said shaft is journaled, are made vertically adjustable. These boxes are secured to the ends of the base by bolts a2, which pass through vertical slots a3 in the base. The boxes are moved down to the desired position by set-bolts co4, which screw down through brackets a5 on the ends of the base and bear upon said boxes. This movement of the said shaft B changes its position relative to the shaft F, and unless such change of position were compensated for would effect the engagement of the two gears fand h. The shaft F is mounted eccentrically in a cylindrical sleeve a, which may be turned in the brackets afin the base, and they are so turned to cause said shaft F to approach shaft B, and thus to compensate for the movement of the latter shaft. The sleeves are fixed in position by the set-screws a8, which screw through the brackets al and impinge against said sleeves.

Secured to the base are four vertical standards H IjI H H,which are united at their upper ends in pairs by the transverse but slightly-oblique yokes J J C represents across-head the ends of which embrace and are vertically movable upon the standards H H. C represents a similar c rosshead, which embraces and is movable upon the standards-H H. Each of these crossheads is formed of two plates c c', having in their proximate faces between their ends aj recess c2, which is shown in Fig. 7 and in dotted lines in Fi g. 3.' The vertical tubular holes near the ends of these cross-heads through which the standards Hull pass are formed The plates are secured together by bolts c4, by means' of which the plates may be made to tightly clamp the standards. On the outer sides of these plates are ,the horizontal perforated bosses c5 c, which The crosshead so stands that the axes of these bearings are formed oblique to the axis of the shaft to be/straightened, said Obliquity being, however; in the reverse direction to the Obliquity of the shafts g of the draft-rolls G G, but at substantially the sameangle.' The shafts d, to which the upper pairs of draft-rolls are secured', are mounted in these bearings. These upper pairs of draft-rolls D D are above points which are between the lower pairs of draftrolls, as shown in Fig. l.

The cross-heads are moved up and down by means of the two screws K K', which screw through the yokes J J and are swiveled at their lower ends to said cross-heads. The u pper ends of lthese screws support a cross-bar L, which bar loosely embraces the cylindrical ends of the screws and rests upon the hubs of the gears k Zd, which are fixed to said screws. In the middle of this cross-bar a rotatable ver.- tical shaft M is journaled, and it is supported by a collar m, fixed to it above the cross-bar. On the lower end of this shaft a gear m is fixed, which gear meshes with the two gears 7e k. A hand-wheel m2 on the upper end of the shaft M furnishes means for rotating it,

`whereby both screws are simultaneously turned to raiseor lower the cross heads equally. I

The shaft to be straightened (indicated by X) rests upon and between the pairs of rolls G G. The rolls D D are caused to bear upon the top of the said shaft with an ydesired pressure by the operation of the screws K K. When the pressure is properly regulated and the-draft-rolls G G are rotated as described, the shaft X and the upper draft-rolls D D are likewise rotated and the shaft is drawn slowly endwise through the machine, being straightened as it so moves.

The ends of the shaft X are supported upon pairs of oblique draft-rolls R, R, which are mounted on carriages T with their axes parallel to the axes of the draft-rolls G G. The wheels o f these carriages ride on tracks laid on the floor, and the carriages may be moved to my position in which they will be best adapted to support the shaft. Fach carriage is provided with a vertically-.movable bolt adapted to engage in holes in the floor and thus hold the carriages from moving. These carriages consist of sides t t, which are united at their upper ends by the housings r of the draft-rolls. They are united near their lower ends by a cross-bar t2, which furnishes a bearing for the counter-shaft B. This cross-bar is provided at its ends with two laterally-extended flanges t3, in each of which is a vertical slot t4. (Shown by dottedlines in Fig. 4L.) Bolts U pass through these slots and through the sides t', whereby this bar may be adj usted vertically to preserve the alinement of the shaft B".

O n the shaft of each of the draft-rolls R R is a sprocket-wheel r2. On the shaft B are sprocket-wheels b4, which are connected with the shaft by a spline, which permits them to slide along the shaft, but which compels them to revolve with it. Sprocket-chains V V respectively connect one of thesprocket-wheels r2 with one of the wheels h4, whereby the draftrolls R R are positively driven. The draftrolls R R not only help to support shaft X, but they also help to rotate it and move it endwise.

Having described my invention, I claim-l IOO IIO

IIS

vsprocket-chains transmitting motion to thev sprocket-wheels last named from those on the said shaft, upper pairs of obliquely-placed draft-rolls, and means for adjusting said upper draft-rolls vertically, substantially as specified.

3. Ina machine for straightening shafts, in combination, the base, pairs of positivelydriven and obliquely-placedl lower draft-rolls mounted upon said base, vertical standards, vertically-adjustable cross-heads which embrace and are guided by said standards, means for rigidly fastening said cross-heads to said standards, pairs of obliqnely-placeddraft-rolls mounted in said cross-heads, yokcs secured to said standards above said crossheads, and adj ustment-screws for moving said cross-heads, which screws are supported by said yokes, substantially as specified.

et. In a machine for straightening shafts, in combination, two vertically movable crossheads, pairs of draft-rolls mounted therein, vertical standards for guiding said crossheads, yokes connecting their upper ends, screws working through said yokes and swiveled to said cross-heads and having cylindrical upper ends, gears secured to said screws, a cross-bar embracing the cylindrical parts of said screws and supported thereon, a vertical shaft mounted in and supported by said cross-bar, and a pinion secured to said screw in mesh with said gears, substantially as specified.

5. In a machine for straightening shafts, in combination, a fixed base, pairs of obliquelyset draft-rolls mounted thereon, and vertically-adjustable pairs of obliqueupper draftrolls, a counter-shaft mounted in adjustable bearings, sprocket wheels secured respectively to the said shaft and to the lower draftrolls, sprocketchains,'a main driving-shaft, a cylindrical sleeve in which the latter shaft is eccentrically mounted, means for locking said sleeve to the base, and suitable connections between the two shafts, substantially as specified.

6. In a machine for straightening shafts, in combination, the base, obliquely-set pairs of lower draft-rolls mounted thereon, vertical standards, cross-heads, each consisting of two plates bolted together and having in their proximate faces, near their ends, vertical grooves which embrace the standards, and,

between their ends, recesses for the reception of an upper pair of draft-rolls, pairs of draftrolls mounted in said plates extending into said recesses, and means for vertically adjusting said cross heads, substantially as specified.

7. In a machine for straightening shafts, the combination of a base, a housing fixed obliquely thereon and composed of two similarly-shaped sections e e, each of Awhich has an inwardly-offset boss e3 surrounding one of the bearings of the roll-shafts, with two draftroll shafts mounted in bearings in said housving-sections, a draft-roll, and a rigidly-connected sprocket-wheel upon each of saidshafts, the hubs of said rolls being adjacent to one of said inwardly-projecting bosses e3,

and the sprocket-wheels being atthe oppo-,

site ends of said rolls, substantially as specified.

8. -In a machine for straightening shafts, a

draft-roll housing consisting of two sections of the same size and shape, each having on its inner face an inwardly-offset boss c3, substantially as specified.

9. In a machine for straightening shafts, a draft-roll housing consisting of two sections` of the same size and shape each consisting of a horizontal base .and a vertical fiange on the inner edgeof said base, which flange has the sector-shaped upward extension e6, and is .also offset inward and provided on this inward offset with the boss e3, substantially as specified.

10. In a machine for straightening shafts, in combination, straightening devices comprising upper and lower pairs of obliquelyset draft-rolls, an operating-shaft, mechanism for .transmitting motion therefrom to the lower draft-rolls, an adjustable carriage hav- .ing a bearing for said shaft and in .which it may slide, a pair of obliquely-set draft-rolls mounted upon the carriage, and mechanism for transmitting motion from the shaft to said draft-rolls, whereby the end of the shaft being straightened is supported and its longitudinal movement is assisted, substantially as specified.

l1.` A wheel-carriage for supporting a shaft which is being straightened in a fixed straightening-machine, consisting of two side plates, a cross-bar extending between and secured to said plates and having a bearingfor a shaft, a housing connecting the upper ends of said plates, a pair of oblique draft-rolls mounted in said housing, sprocket-wheels secured to said rolls, a rotating shaft loosely mounted in said cross-bar andadapted to slide through the same, two sprocket-wheels secured upon said shaft by a spline and groove, and sprocket-chains connecting the upper and lower sprocket-wheels, substantially as specified.

12. In a machine for straightening shafts, in combination, a base, one set of lower draftrolls arranged in pairs and mounted obliquely upon said base, a set of vertically-adjustable Y upper draft-rolls arranged obliquely and in IOO IIO

pairs, movable carriages on vboth sides of the base, obliqueiy-placed pairs of draft-'rolls mounted on said carriages, a shaft mounted in the base and extended on both sides thereof, bearings carried by the carriages Which 'support said shaft, whereby the carriages may be moved toward and from the base without changing their operative relation to said shaft, and mechanism for transmitting 

